Impact of Transition Metal Doping on the Optical Characteristics of Se-Te Thin Film

Impact of Transition Metal Doping on the Optical Characteristics of Se-Te Thin Film | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Impact of Transition Metal Doping on the Optical Characteristics of Se-Te Thin Film Nisha Kumari, S. Fouad, H. Atiya, Neeraj Mehta This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6330559/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 27 May, 2025 Read the published version in Optical and Quantum Electronics → Version 1 posted 9 You are reading this latest preprint version Abstract The optical properties of Se80-xTe20TMx thin films (Where, TM = Fe, Co, Ni, Cu, and x = 0 or 2) were studied for their compositional dependence. Binary and ternary thin films were deposited onto preheated glass substrates using the thermal evaporation method under high vacuum conditions (~10⁻⁶ Torr). Through the collection of observational spectral data for both reflectance and transmittance across 200 – 2500 nm using an Ultraviolet (UV) - spectrophotometer, we evaluated the optical properties of the prepared thin films. Distinct samples exhibited unique optical characteristics. The optical absorption coefficient (α), refractive index (n), and extinction coefficient (k) were determined from the transmission (T(λ)) and absorption measurements. The analysis includes various linear optical parameters, such as the refractive index, extinction coefficient, real and imaginary parts of the dielectric constant, and loss tangent, all discussed with wavelength. The optical band gap (E g opt ) and Urbach tail (E u ) have been determined through the analysis of the spectral variation in the dispersion characteristics. This calculation provides critical insight into the electronic structure and disorder within the material. The current samples exhibit the indirect optical transition, which is confirmed by the transition power factor m. Using the theoretical Wemple-DiDomenico model, we calculated the static refractive index (n), oscillation energy (E 0 ), and dispersion energy (E d ). The refractive index dispersion data adhered to the single oscillator model, which facilitated the determination of the dispersion parameters and the high-frequency dielectric constant. Further, the nonlinear characteristics of the samples are evaluated through their susceptibility and nonlinear refractive index. Transition metal elements Chalcogenides Optical constants nonlinear optical studies Wemple and DiDomenico single oscillator model Full Text Additional Declarations No competing interests reported. Supplementary Files Highlights.docx Cite Share Download PDF Status: Published Journal Publication published 27 May, 2025 Read the published version in Optical and Quantum Electronics → Version 1 posted Editorial decision: Revision requested 16 Apr, 2025 Reviews received at journal 16 Apr, 2025 Reviews received at journal 13 Apr, 2025 Reviewers agreed at journal 05 Apr, 2025 Reviewers agreed at journal 02 Apr, 2025 Reviewers invited by journal 02 Apr, 2025 Editor assigned by journal 30 Mar, 2025 Submission checks completed at journal 29 Mar, 2025 First submitted to journal 28 Mar, 2025 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-6330559","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":443786204,"identity":"39c03892-e32f-49de-bb0f-96724e9075d3","order_by":0,"name":"Nisha Kumari","email":"","orcid":"","institution":"Banaras Hindu University","correspondingAuthor":false,"prefix":"","firstName":"Nisha","middleName":"","lastName":"Kumari","suffix":""},{"id":443786205,"identity":"0e53b765-3da8-44e9-8aba-f7b33979e092","order_by":1,"name":"S. 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Binary and ternary thin films were deposited onto preheated glass substrates using the thermal evaporation method under high vacuum conditions (~10⁻⁶ Torr). Through the collection of observational spectral data for both reflectance and transmittance across 200 – 2500 nm using an Ultraviolet (UV) - spectrophotometer, we evaluated the optical properties of the prepared thin films. Distinct samples exhibited unique optical characteristics. The optical absorption coefficient (α), refractive index (n), and extinction coefficient (k) were determined from the transmission (T(λ)) and absorption measurements. The analysis includes various linear optical parameters, such as the refractive index, extinction coefficient, real and imaginary parts of the dielectric constant, and loss tangent, all discussed with wavelength. The optical band gap (E\u003csub\u003eg\u003c/sub\u003e\u003csup\u003eopt\u003c/sup\u003e) and Urbach tail (E\u003csub\u003eu\u003c/sub\u003e) have been determined through the analysis of the spectral variation in the dispersion characteristics. This calculation provides critical insight into the electronic structure and disorder within the material. The current samples exhibit the indirect optical transition, which is confirmed by the transition power factor m. Using the theoretical Wemple-DiDomenico model, we calculated the static refractive index (n), oscillation energy (E\u003csub\u003e0\u003c/sub\u003e), and dispersion energy (E\u003csub\u003ed\u003c/sub\u003e). The refractive index dispersion data adhered to the single oscillator model, which facilitated the determination of the dispersion parameters and the high-frequency dielectric constant. 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